# CodeToPDF

> Free online developer tools — convert code to PDF, format JSON, decode JWTs, generate UUIDs, test regex, and more. 19+ tools, all free, no signup required. Most tools run 100% in your browser for instant, private results.

## About

CodeToPDF is a growing suite of free, instant, and privacy-first developer utilities built by Kaushal Chhaunkar. The platform was born from a simple frustration — converting source code into beautiful, syntax-highlighted PDFs was way too hard. Today it has grown into a full developer toolkit covering formatters, encoders, generators, and everyday dev utilities.

### Core Principles

- **Fast & Instant**: No waiting, no loading screens. Most tools run entirely in the browser for zero-latency execution.
- **Private by Design**: Input is never stored or logged. For server-side tools (PDF conversion), files are permanently destroyed immediately after processing.
- **Genuinely Free**: No hidden paywalls, no "freemium" credits, no account required.

### Tech Stack

Built with Next.js, React, TypeScript, Tailwind CSS, Node.js, Express, MongoDB, AWS, and Puppeteer.

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## PDF Tools

### Code to PDF
- **URL**: https://www.codetopdf.com/tools/code-to-pdf
- **What it does**: Converts source code files into professionally formatted, syntax-highlighted PDF documents. Upload one or multiple files, choose a theme, and download a print-ready PDF in seconds.
- **Supported languages**: JavaScript, TypeScript, Python, Java, C, C++, C#, Go, Ruby, Rust, Swift, Kotlin, PHP, SQL, HTML, CSS, JSON, XML, YAML, Markdown, and 30+ more (50+ total).
- **Themes**: Monokai, Dracula, GitHub Light, VS Code Dark, and more.
- **Features**: Drag-and-drop multi-file upload, configurable font size and page size (A4, Letter), line numbers toggle, no signup required.
- **How to use**: Upload source code files → select a syntax highlighting theme → configure optional settings (font size, page size, margins) → click "Convert to PDF" → download instantly.
- **File limits**: Up to 20 files per conversion, each up to 5 MB.
- **Security**: Files are processed in isolated containers and permanently deleted after conversion. Zero-retention policy.
- **Clarification**: This tool prints raw code with syntax highlighting. It does NOT execute code or render HTML visually.
- **Target audience**: Developers who need to include code in reports, academic papers, client deliverables, or print-ready documentation.

### Python Code to PDF
- **URL**: https://www.codetopdf.com/tools/python-code-to-pdf
- **What it does**: Executes Python scripts in a secure, isolated cloud sandbox and allows downloading generated PDF documents, charts, images, or reports.
- **Pre-installed libraries**: PyMuPDF (fitz), ReportLab, Matplotlib, Pandas, NumPy, Seaborn, Pillow, OpenPyXL, Jinja2, FPDF2, Plotly, PyGal, Tabulate.
- **Features**: Real-time streaming console output (stdout & stderr), auto-captures generated PDFs/charts/images, non-root sandbox execution with network isolation.
- **Execution limits**: 30-second timeout, 1 GB RAM, max 100 KB script size.
- **How to use**: Write or paste Python script → click "Execute & Generate PDF" → watch live console logs → download generated files.
- **Security**: Code runs in a strictly isolated non-root sandbox without network access, environment secrets, or persistent storage. All temp files are purged immediately.
- **Clarification**: This tool RUNS Python and captures generated PDFs. It does NOT convert .py source code text to PDF (use Code to PDF for that).
- **Target audience**: Data scientists, analysts, and developers who generate PDF reports, charts, or visualisations programmatically with Python.

### Markdown to PDF
- **URL**: https://www.codetopdf.com/tools/markdown-to-pdf
- **What it does**: Converts Markdown documents to professionally styled PDFs preserving headings (H1–H6), code blocks with syntax highlighting, tables, ordered and unordered lists, blockquotes, and horizontal rules.
- **Themes**: Default, GitHub, Minimal.
- **How to use**: Paste or upload Markdown → select a PDF theme → click "Convert to PDF" → download the styled PDF.
- **Conversion time**: Typically 5–15 seconds.
- **Security**: Content permanently deleted from servers immediately after PDF generation.
- **Clarification**: This renders Markdown to PDF. It does not print raw markdown code.
- **Target audience**: Technical writers, documentation authors, README maintainers.

### HTML to PDF
- **URL**: https://www.codetopdf.com/tools/html-to-pdf
- **What it does**: Converts HTML with inline or embedded CSS to pixel-accurate PDF documents. Supports flexbox, grid, custom colours, borders, shadows, and Google Fonts via @import.
- **Features**: Custom page size (A4, Letter), orientation (portrait, landscape), header and footer options. External scripts are not executed for security.
- **How to use**: Paste HTML with CSS → select page size and orientation → click "Convert to PDF" → download the PDF.
- **Clarification**: This renders HTML visually. If you want to print raw HTML code, use Code to PDF.
- **Target audience**: Web developers generating reports, invoices, or documentation from HTML templates.

### Node.js Code to PDF
- **URL**: https://www.codetopdf.com/tools/nodejs-code-to-pdf
- **What it does**: Executes Node.js scripts in a secure cloud sandbox and captures generated PDFs or files for download.
- **Pre-installed libraries**: pdfkit, jspdf.
- **Features**: Real-time console output, auto-captures generated files, isolated cloud environment.
- **How to use**: Write Node.js script → require pre-installed libraries like pdfkit → click "Execute & Generate PDF" → download generated files.
- **Security**: Isolated sandbox container without access to internal networks or secrets.
- **Target audience**: JavaScript and Node.js developers who want to generate documents dynamically.

### LaTeX to PDF
- **URL**: https://www.codetopdf.com/tools/latex-to-pdf
- **What it does**: Compiles LaTeX code directly in a cloud sandbox using standard pdflatex, generating beautifully typeset academic PDFs.
- **Features**: Real-time compilation console output, zero-setup cloud environment.
- **How to use**: Write LaTeX code → click "Compile & Generate PDF" → watch logs → download PDF.
- **Security**: Isolated compilation sandbox.
- **Target audience**: Researchers, academics, and students formatting papers, resumes, and math documents.

### Web Link to PDF
- **URL**: https://www.codetopdf.com/tools/web-link-to-pdf
- **What it does**: Captures a snapshot of any public web URL and converts it into a high-quality PDF with CSS styles intact.
- **Features**: Captures live CSS and web fonts, configurable page size.
- **How to use**: Enter full public URL → select page size → click "Convert to PDF" → download the snapshot.
- **Target audience**: Anyone needing to archive web pages, save receipts, or capture visual documentation of websites.

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## Formatters

### JSON Formatter
- **URL**: https://www.codetopdf.com/tools/json-formatter
- **What it does**: Formats, beautifies, and indents raw or minified JSON with instant syntax validation and error hints. Configurable indentation (2 or 4 spaces).
- **Privacy**: Runs 100% in the browser. Data never leaves the device.
- **How to use**: Paste JSON → formatted output appears instantly → toggle indentation → copy to clipboard.

### JSON Validator
- **URL**: https://www.codetopdf.com/tools/json-validator
- **What it does**: Validates JSON syntax in real time with precise error locations showing exact line number and column position. Catches missing quotes, trailing commas, unexpected tokens, mismatched brackets, and more.
- **Privacy**: Runs 100% in the browser.
- **How to use**: Paste or type JSON → check the valid/invalid status badge → fix reported errors using the exact line and column information.

### JSON Compare
- **URL**: https://www.codetopdf.com/tools/json-compare
- **What it does**: Deep-diffs two JSON objects and shows every added (green), removed (red), and changed (yellow) key with full dot-notation paths. Fully recursive — drills into every level of nesting.
- **Privacy**: Runs 100% in the browser.
- **How to use**: Paste JSON A in the left panel → paste JSON B in the right panel → click "Compare" → review differences with full paths.

### SQL Formatter
- **URL**: https://www.codetopdf.com/tools/sql-formatter
- **What it does**: Formats messy or minified SQL into clean, indented, readable queries. Handles CTEs (WITH clauses), subqueries, JOINs, and stored procedure syntax.
- **Supported dialects**: MySQL, PostgreSQL, SQLite, T-SQL (MSSQL), BigQuery, generic SQL.
- **Features**: Multi-dialect support, keyword case toggle (uppercase/lowercase), configurable indentation.
- **How to use**: Paste SQL → select dialect → toggle keyword casing → copy the formatted output.

### HTML Formatter
- **URL**: https://www.codetopdf.com/tools/html-formatter
- **What it does**: Formats and indents raw or minified HTML markup for better readability. Preserves inline `<script>` and `<style>` blocks unchanged.
- **Features**: Configurable indentation (2 or 4 spaces), attribute sorting option.
- **How to use**: Paste HTML → choose indentation size → copy the formatted result.

### CSS Formatter
- **URL**: https://www.codetopdf.com/tools/css-formatter
- **What it does**: Expands minified CSS into a clean, readable stylesheet with consistent indentation and optional property sorting.
- **How to use**: Paste minified CSS → choose indentation and sorting preferences → copy the formatted stylesheet.

### XML Formatter
- **URL**: https://www.codetopdf.com/tools/xml-formatter
- **What it does**: Formats and validates XML documents. Reports syntax errors (unclosed tags, invalid characters) with details. Preserves namespace prefixes and URIs.
- **How to use**: Paste XML → review validation results → copy the indented output.

### YAML Formatter
- **URL**: https://www.codetopdf.com/tools/yaml-formatter
- **What it does**: Formats YAML content and converts between YAML and JSON. Preserves original key order. Validates syntax.
- **Use cases**: Kubernetes configs, CI/CD pipeline definitions, Ansible playbooks.
- **How to use**: Paste YAML → format or convert to JSON → copy the output.

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## Encoders & Decoders

### Base64 Encode
- **URL**: https://www.codetopdf.com/tools/base64-encode
- **What it does**: Encodes text, URLs, or data to Base64 format. Supports standard and URL-safe Base64. Handles Unicode text.
- **Privacy**: Runs 100% in the browser.
- **How to use**: Type or paste text → encoded output appears instantly → toggle URL-safe mode if needed → copy to clipboard.

### Base64 Decode
- **URL**: https://www.codetopdf.com/tools/base64-decode
- **What it does**: Decodes Base64-encoded strings back to plain text. Supports standard and URL-safe Base64 with error detection for invalid padding or characters.
- **Privacy**: Runs 100% in the browser.
- **How to use**: Paste Base64 string → decoded output appears instantly → copy to clipboard.

### JWT Decoder
- **URL**: https://www.codetopdf.com/tools/jwt-decoder
- **What it does**: Decodes JSON Web Tokens and displays header, payload, and all claims. Converts exp and iat timestamps to human-readable dates. Highlights expired tokens.
- **Privacy**: Runs 100% in the browser. Token never leaves the device.
- **Note**: Decode-only. Signature verification is not performed — that requires the secret key server-side.
- **How to use**: Paste JWT → view decoded header and payload → check expiry status → review all claims.

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## Generators

### UUID Generator
- **URL**: https://www.codetopdf.com/tools/uuid-generator
- **What it does**: Generates cryptographically secure v4 UUIDs using the browser's native crypto API. Bulk generate up to 100 at a time.
- **Features**: Uppercase/lowercase toggle, copy all to clipboard, individual UUID copy.
- **Privacy**: Runs 100% in the browser.
- **How to use**: Set quantity (1–100) → click "Generate" → toggle case format → copy individual UUIDs or all at once.

### QR Code Generator
- **URL**: https://www.codetopdf.com/tools/qr-generator
- **What it does**: Generates QR codes for any URL, text, phone number, or data. Download as PNG (raster) or SVG (vector). Configurable size (128–1024px), four error correction levels (L/M/Q/H), custom foreground and background colours.
- **Privacy**: Runs 100% in the browser.
- **How to use**: Enter data → adjust size, error correction, and colours → preview updates live → download as PNG or SVG.

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## Utilities

### Regex Tester
- **URL**: https://www.codetopdf.com/tools/regex-tester
- **What it does**: Tests and debugs regular expressions with live match highlighting. Shows capture groups, match count, and supports flags (global, case-insensitive, multiline, dotAll). Uses JavaScript's built-in RegExp engine (ECMAScript spec).
- **Privacy**: Runs 100% in the browser.
- **How to use**: Enter regex pattern → enable flags → paste test string → review highlighted matches and capture groups.

### Unix Timestamp Converter
- **URL**: https://www.codetopdf.com/tools/unix-timestamp
- **What it does**: Converts Unix timestamps (epoch time) to human-readable dates and vice versa. Supports seconds and milliseconds. Shows both UTC and local timezone.
- **Features**: "Now" button for current timestamp, bidirectional conversion.
- **Privacy**: Runs 100% in the browser.
- **How to use**: Paste timestamp → view date in UTC and local time, or use date picker → view Unix timestamp.

### Markdown Preview
- **URL**: https://www.codetopdf.com/tools/markdown-preview
- **What it does**: Live side-by-side Markdown editor and preview. Supports GitHub Flavored Markdown including headings, bold, italic, code blocks, tables, task lists, blockquotes. Can export rendered HTML.
- **Privacy**: Runs 100% in the browser using the marked library.
- **How to use**: Type or paste Markdown → view live preview → switch between split and preview-only mode → copy HTML output.

### JSON to TypeScript
- **URL**: https://www.codetopdf.com/tools/json-to-typescript
- **What it does**: Converts JSON objects directly into valid TypeScript interfaces. Automatically detects nested types, arrays, and optional properties.
- **Features**: Instant real-time conversion, nested interface generation, export keyword toggle.
- **Privacy**: Runs 100% in the browser. Data never leaves your device.
- **How to use**: Paste JSON payload → view generated interfaces → adjust interface name and export toggle → copy code.

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## Frequently Asked Questions

**Are these tools really free?**
Yes. Every tool is completely free with no hidden limits, credits, or paywalls. No signup required.

**Do the tools store my data?**
Client-side tools (formatters, encoders, generators) run entirely in the browser — nothing is sent to servers. For server-side tools like PDF conversion, files are permanently deleted immediately after processing.

**Do I need an account?**
No account is required for any tool. Open the page, use the tool, done.

**Which programming languages does Code to PDF support?**
Over 50 languages including JavaScript, TypeScript, Python, Java, C, C++, Go, Rust, Ruby, Swift, Kotlin, PHP, SQL, HTML, CSS, JSON, YAML, Markdown, and more.

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## Links

- Homepage: https://www.codetopdf.com
- All Tools: https://www.codetopdf.com/tools
- About: https://www.codetopdf.com/about
- Features: https://www.codetopdf.com/features
- Pricing: https://www.codetopdf.com/pricing
- Contact: https://www.codetopdf.com/contact
- Security: https://www.codetopdf.com/security
- Privacy Policy: https://www.codetopdf.com/privacy
- Terms of Service: https://www.codetopdf.com/terms
- Roadmap: https://www.codetopdf.com/roadmap